PLECOTUS 257 



1829. [Vespertilio auritus] y austriacus Fischer, Synops. Mamm., p. 117. 



Based on the " second variety" of Desmarest, Diet, des Sci. Nat., 



lviii, p. 51, 1829 (Vienna, Austria). 

 1832. Plecotus velatus I. Geoffroy, Guerin's Mag. de Zool., n, CI. i, pi. 2, 



p. 5 (not numbered), footnote (Name applied by lapsus calami to 



the common Plecotus of England). 

 1840. Plecotus megalotos Schinz, Europ. Fauna, i, p. 19 (Synonym of 



auritus ; Brehm cited as authority). 

 1857. Plecotus auritus Blasius, Siiugethiere Deutschlands, p. 39. 

 1860. Plecotus kirschbaumii Koch, Achter Ber. Oberhess. Gesellseh. 



Natur.- u. Heilkunde, Giessen, p. 40, May, 1860 (Dillenburg, 



Oberhessen, Germany). 

 1863. [Plecotus auritus] var. typus Koch, Jahrb. des Vereins flir Natur- 



kunde im Herzogthum Nassau, xviii, p. 406 (Wiesbaden, Nassau, 



Germany). 

 1863. [Plecotus auritus] var. montanus Koch, Jahrb. des Vereins fiir Natur- 



kunde im Herzogthum Nassau, xviii, p. 406 (Westerwald, Nassau, 



Germany). 

 1863. [Plecotus auritus] var. brevipes Koch, Jahrb. des Vereins fiir Natur- 



kunde im Herzogthum Nassau, xviir, p. 407 (Substitute for kirsch- 

 baumii Koch). t 

 1878. Plecotus auritus Dobson, Catal. Chiropt. Brit. Mus., p. 178. 

 1910. Plecotus auritus Trouessart, Faune Mamm. d'Europe, p. 12. 



Type locality. — Sweden. 



Geographical distribution. — Prom Ireland eastward into Asia, 

 and from the Mediterranean north to the Scandinavian Peninsula. 



Diagnosis. — Characters as in the genus ; auditory bulla? 

 not excessively enlarged ; forearm about 37 mm. 



External characters. — General form slender and delicate, the 

 most conspicuous feature the greatly enlarged ears, the super- 

 ficial area of which together when outstretched is considerably 

 greater than that of entire body. Muzzle rather narrow, its 

 width at middle about equal to distance from tip to point on 

 forehead at middle of base of joining membrane of ears ; glandular 

 swellings not conspicuous, but extending up over sides to median 

 line behind nostrils, and backward to eye. Nostrils opening 

 upward and slightly forward, their orifices crescentic with slit- 

 like posterior elongation ; space between nostrils flat, crossed 

 at middle by a transverse groove with overhanging anterior edge. 

 Lips moderately full, smooth. Ear very large, extending about 

 20 mm. beyond tip of muzzle when laid forward, its length from 

 meatus nearly equal to that of forearm : general outline of conch 

 a simple, rater elongate oval, the anterior and posterior borders 

 evenly convex, the tip rather narrowly rounded ; anterior bases 

 joined across forehead, the membrane at point of junction about 

 2-5 mm. high ; outline of anterior border broken about 3 mm. 

 above base by conspicuously projecting, evenly rounded lobe 

 2 mm. long by 3 mm. wide at base ; antitragus scarcely indicated, 

 the posterior border of conch terminating abruptly a little behind 

 level of eye ; inner surface of conch with about twenty faint 

 cross striations ; joining membrane thinly furred ; a hairy line 



